Diagnostic Procedure

Check Overall Function-I
With CONSULT-II
1. Turn ignition switch ON.
2. Select BRAKE SW1 in DATA MONITOR mode with CONSULT-II.
3. Check BRAKE SW1 indication under the following conditions.
  
  Fig 1: Testing BRAKE SW1 Circuit With CONSULT-II
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Identifying Brake Switch 1 Specifications (CONSULT-II)
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the following conditions.
  NOTE: Manufacture refers to Intelligent Cruise Control (ICC) Brake Switch Or Automatic Speed Control Device (ASCD) as Brake Switch 1.
  Manufacture refers to Stop Lamp Switch as Brake Switch 2.
  
  Fig 3: Testing ECM Signal To Brake Switch 1 Circuit (W/DVOM)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Identifying Brake Switch 1 Circuit Specifications (W/DVOM)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: go to 2.
2. NG: go to 3 .
Check Overall Function-II
With CONSULT-II

Check BRAKE SW2 indication in DATA MONITOR mode.

Fig 5: Testing BRAKE SW2 Circuit With CONSULT-II
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 6: Identifying Brake Switch 2 Specifications (CONSULT-II)
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Check voltage between ECM terminal 101 and ground under the following conditions.

NOTE: Manufacture refers to Intelligent Cruise Control (ICC) Brake Switch Or Automatic Speed Control Device (ASCD) as Brake Switch 1.
Manufacture refers to Stop Lamp Switch as Brake Switch 2.

Fig 7: Testing ECM Signal To Brake Switch 2 Circuit (W/DVOM)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 8: Identifying Brake Switch 2 Circuit Specifications (W/DVOM)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: go to 16 .
2. NG: go to 11 .
Check ICC Brake Switch Circuit
1. Turn ignition switch OFF.
2. Disconnect ICC brake hold relay.
  
  Fig 9: Locating ICC Brake Hold Relay
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between ICC brake hold relay terminal 3 and ground with CONSULT-II or tester.
  
  Fig 10: Testing Circuit Through ICC Brake Hold Relay (W/DVOM)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Voltage: Battery voltage
OK or NG
1. OK: go to 8 .
2. NG: go to 4.
Check ICC Brake Switch Power Supply Circuit
1. Turn ignition switch OFF.
2. Disconnect ICC brake switch harness connector.
  
  Fig 11: Locating ICC Brake & Stop Lamp Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between ICC brake switch terminal 1 and ground with CONSULT-II or tester.
  
  Fig 12: Testing Circuit Through ICC Brake Switch (W/DVOM)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Voltage: Battery voltage
OK or NG
1. OK: go to 6 .
2. NG: go to 5.
Detect Malfunctioning Part
Check the following.
- Fuse block (J/B) connector E201
- 10A fuse
- Harness for open or short between ICC brake switch and fuse
  1. Repair open circuit or short to ground or short to power in harness or connectors.
Check ICC Brake Switch Input Signal Circuit For Open And Short-I
1. Turn ignition switch OFF.
2. Check harness continuity between ICC brake hold relay terminal 3 and ICC brake switch terminal 2.
  Refer to wiring diagram. See Figure .
  1. Continuity should exist .
3. Also check harness for short to ground and short to power.
OK or NG
1. OK: go to 7.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
Check ICC Brake Switch
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: go to 16 .
2. NG: Replace ICC brake switch.
Check ICC Brake Switch Input Signal Circuit For Open And Short-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ICC brake hold relay terminal 4 and ECM terminal 108.
  Refer Wiring Diagram. See Figure .
  1. Continuity should exist .
4. Also check harness for short to ground and short to power.
OK or NG
1. OK: go to 10 .
2. NG: go to 9.
Detect Malfunctioning Part
Check the following.
- Harness connectors E211, M41
- Harness for open or short between ICC brake hold relay and ECM
  1. Repair open circuit or short to ground or short to power in harness or connectors.
Check ICC Brake Hold Relay
Refer to COMPONENT INSPECTION .
1. OK: go to 16 .
2. NG: Replace ICC brake hold relay.
Check Stop Lamp Switch Power Supply Circuit
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector. See Fig 11 .
3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.
  
  Fig 13: Testing Stop Lamp Switch Circuit (W/DVOM)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Voltage: Battery voltage
OK or NG
1. OK: go to 13 .
2. NG: go to 12.
Detect Malfunctioning Part
Check the following.
- Fuse block (J/B) connector E201.
- 10A fuse
- Harness for open or short between stop lamp switch and battery
  1. Repair open circuit or short to ground or short to power in harness or connectors.
Check Stop Lamp Switch Input Signal Circuit For Open And Short
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.
  Refer to wiring diagram. See Figure .
  1. Continuity should exist .
3. Also check harness for short to ground and short to power.
OK or NG
1. OK: go to 15 .
2. NG: go to 14.
Detect Malfunctioning Part
Check the following.
- Harness connectors E211, M41
- Harness for open or short between ECM and stop lamp switch
  1. Repair open circuit or short to ground or short to power in harness or connectors.
Check Stop Lamp Switch
Refer to COMPONENT INSPECTION

OK or NG
1. OK: go to 16.
2. NG: Replace stop lamp switch.
Check Intermittent Incident
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. Inspection end